Control system interconnecting the operation of two machines

ABSTRACT

In an arrangement for first operating a toe-lasting machine to toe last a shoe and then operating a heel-lasting machine to heel last a shoe, a mechanism for shifting the position of a toe rest of the heel-lasting machine in accordance with the length of the shoe as determined by the position of engagement with the shoe of a heel clamp in the toe-lasting machine.

United States Patent Inventor Jacob S. Kamborian 70 Crestwood Road, West Newton, Mass. 02158 Appl. No. 74,347

Filed Sept. 22, 1970 Patented Dec. 2], 1971 CONTROL SYSTEM INTERCONNECTING THE OPERATION OF TWO MACHINES 8 Claims, 22 Drawing Figs.

[1.8. CI 12/ l R int. Cl A43d Field of Search 12/1 R, l A, l W

[56] References Cited UNITED STATES PATENTS 2.960,703 l l/l960 Dorosz 12/] A 3,024,480 3/1962 Baker et al 12/] A Primary Examiner- Patrick D. Lawson Attorney-Albert Gordon ABSTRACT: In an arrangement for first operating a toe-lasting machine to toe last a shoe and then operating a heel-lasting machine to heel last a shoe. a mechanism for shifting the position of a toe rest of the heel-lasting machine in accordance with the length of the shoe as determined by the position of engagement with the shoe of a heel clamp in the toe-lasting machine.

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SHEET 12% 18 PATENTEU 1151121 1911 SHEET 15 HF 18 CONTROL SYSTEM INTERCONNECTING 'llI-llE GFERATlON OF TWO MAlCI'IINES In pending patent application Ser. No. 858,667 filed Sept. 17, I969, now U.S. Pat. No. 3,579,690 there is disclosed a toe lasting machine, for wiping the toe portion of an upper margin against an insole, that includes a heel clamp for holding a shoe assembly in position during the wiping position. The heel clamp is movable from a remote position to a position of engagement with the heel of the shoe assembly. After performing the toe-wiping operation in a toe-lasting machine of this type, it is desirable to wipe the heel portion of the upper margin against the heel portion of the insole in a heel-lasting machine of the type disclosed in pending application Ser. No. H.500 filed May 28, I970. This heel-lasting machine includes a toe rest that supports the vamp of the upper during the heel wiping operation.

When succeeding shoe assemblies are of different length, it is necessary to adjust the position of the toe rest in the heel lasting machine so that the toe rest will be in the proper vampsupporting position. This invention is concerned with a mechanism for enabling the operation of the toe-lasting machine on a particular shoe assembly to automatically adjust the position of the toe rest of the heel lasting machine for that shoe assembly. This is accomplished by modifying the two machines so as to provide a control mechanism so constructed that the distance between the location of engagement of the heel clamp with a shoe assembly in a particular machine cycle of the toe-lasting machine and the location of engagement of the heel clamp with a shoe assembly in a preceding machine cycle of the toe-lasting machine is effective to shift the toe rest an amount that is proportional to this distance in a direction that corresponds to the direction that extends from the location of engagement of the heel clamp with a shoe assembly in the receding machine towards the location of engagement of the heel clamp with a shoe assembly in the particular machine cycle.

Although the control system is disclosed as interrelating the operation of a toe-lasting machine and a heel-lasting machine, the invention in its broadest aspects is useful to interrelate the operation of any two machines, having workpiece engaging members, that successively operate on workpieces of different sizes.

In the drawings:

FIG. 1 is a side elevation of the toe lasting machine;

FIG. 2 is a front elevation of the upper portion of the toelasting machine;

FIG. 3 is a partially sectional side elevation of a portion of the toe lasting machine;

FIG. 4 is a plan view of the heel clamp of the toe-lasting machine;

FIG. Sis a view taken on the line 5-5 of FIG. 4;

FIG. 6 is a view taken on the line 66 of FIG. 4;

FIG. 7 is a view of a portion of the control mechanism taken on the line 7-7 of FIG. ll;

FIG. 8 is a partially sectional side elevation of a portion of the control mechanism;

FIG. 9 is a view taken on the line 9--9 of FIG. 8;

FIG. 10 is a view taken on the line 10 -1tl of FIG. 8;

FIG. 11 is a side elevation of the heel-lasting machine;

FIG. 12 is a front elevation of the heel lasting machine taken on the line 12-ll2 of FIG. 11;

FIG. 13 is a side elevation of a portion of the heel lasting machine;

FIG. 14 is a view taken on the line 1414 of FIG. 13;

FIG. 15 is a schematic representation of a pneumatic circuit of the control system;

FIG. 16 is a schematic representation of an electric circuit of the control system;

FIG. 17 is a representation of a shoe assembly as it appears in the toe-lasting machine just before the toe wiping operation;

FIG. I8 is a view taken on the line l8--18 ofFIG. l7;

FIG. 19 is a representation of a shoe assembly as it appears in the heel-lasting machine at the beginning of a machine cycle of the heel-lasting machine;

FIG. 26 is a view taken on the line 28-40 of FIG. 19;

FIG. 21 is a representation of a shoe assembly as it appears in the heel-lasting machine just before the heel-wiping operation; and

FIG. 22 is a view taken on the line 22-22 of FIG. 21.

The toe-lasting machine 18 is shown in FIGS. 1-6. The operator is intended to be located to the left of the machine as seen in FIG. 1, and a direction extending towards the operator (right to left in FIG. ll) will be referred to as forward" while a direction extending away from the operator (left to right in FIG. 1) will be referred to as rearward."

The toe-lasting machine 18, as shown in FIG. 2, has mounted therein a toe insole rest 12, a pair of forepart rest 14 and an applicator-support 16. As seen in FIGS. 2 and 3, a plate 18 is mounted in a head 20 that forms a part of the machine frame. A pair of toe wipers 22 are mounted in wiper cams 24 that are slidably supported on a thickened block 26 that forms the front of the plate 18. An air-actuated motor 28, secured to a flange 38 on the back of the plate 18, is operatively connected to the toe wipers 22 so as to effect movement of the toe wipers in a toe-wiping stroke.

Referring to FIGS. 141, an air-actuated motor 32 is secured to a hanger 38 depending from the head 20. The piston rod 36 of the motor 32 is connected by way of a plate 38 to a pair of bars 40 that are slidably guided in bosses 42 and 4 1 affixed to the machine frame. A yoke 46 is secured to and straddles the front ends of the bars 40. A post 48 is mounted to the yoke 46.

Referring to FIGS. 4-6, a carrier 58 is mounted to a mount 52 that is secured to the top of the post 48. A heel clamp holder 541 is pivotally mounted to the carrier 50 by means of a pin 56. A heel clamp 58 is mounted to the holder 54 for for swinging movement about a heightwise axis by means of pivot pins 68. The heel clamp is formed of two rearwardly divergent mount portions 62 and 64. A clamp pad 68 is rigidly secured to the portion 62. A clamp pad 68 is pivotally connected, by a hinge 78, to the top of the portion 64 and extends downwardly and rearwardly of a back flange 72 on the portion 64. A spring return air-operated actuating valve 74 is mounted to the flange 72. The valve stem 76 of the valve 74 is urged rear wardly, by the conventional spring in the valve 74, through a hole 78 in the flange 72 to bear against the clamp pad 68 and urge the clamp pad 68 rearwardly about the hinge 70 away from the flange 72.

Referring to FIGS. 1 and 7-10, a rack 80 is secured to and extends rearwardly of the yoke 46. The rack 88 is in mesh with a pinion 82. The pinion 82 is pinned to a shaft 83. The top of the shaft 83 is pinned to a knob 85 that is located above the pinion 82. The shaft 83 extends through a shelf 87 of the frame of the machine 10 and is pinned to a sleeve 89.

A shaft 84, located below the shaft 83, is pinned to a collar 91. A pin 93, secured to the bottom of the shaft 83, is slidable in a slot 95 formed in the collar 91. A compression spring 97, interposed between the shelf 87 and the sleeve 89 acts to yieldably urge the sleeve 89, together with the shaft 83 downwardly to a position herein the sleeve 89 is hearing against the top of the collar 91, the pin 93 is at the bottom of the slot 95, and the pinion 82 is in mesh with the rack 80. The shaft 84 is connected by shafting 86 to a shaft 88 in such a manner that rotation of the pinion 82 causes rotation of the shaft 88. The shaft 88, which has a gear affixed thereto, is rotatably mounted in a housing 92.

A piston 94 is mounted for heightwise movement in a cylinder 96 that is secured to the housing 92. A pin 98, secured to the cylinder 96, extends through a slot 108 in the piston 94 to limit the extent of heightwise movement of the piston in the cylinder. A rod 182, secured to the piston 94, extends upwardly of the cylinder 96 through a boss 104 that forms a part of the frame 92. Pressurized air entering the cylinder 96 below the piston 941 through a line 106 acts to raise the piston 94 and the rod 102 to the extent permitted by the 

1. A control system interrelating the operation of two machines comprising: a first machine operable to perform a first operation on a workpiece during each machine cycle; a second machine operable to perform a second operation on a workpiece; a first workpiece-engaging member in the first machine; means movably mounting the first workpiece-engaging member so as to enable it to engage a workpiece during a machine cycle in a location that is dependent on the size of the workpiece; a second workpieceengaging member in the second machine that is adapted to be engaged by a workpiece during the performance of the second operation; means movably mounting the second workpiece-engaging member in the second machine; and a control mechanism interconnecting the machines operable to cause the second workpiece engaging member to move an amount that is proportional to the distance between the location of engagement of the first workpiece engaging member with a particular workpiece during a particular machine cycle and the location of engagement of the first workpiece engaging member with a different workpiece during the machine cycle that precedes said particular machine cycle and in a direction that corresponds to the direction extending from the location of engagement of the first workpiece engaging member with said different workpiece towards the location of engagement of the first workpiece engaging member with said particular workpiece.
 2. A control system according to claim 1 wherein the control mechanism further comprises: an actuating member mounted to the first workpiece engaging member; means responsive to the engagement of the first workpiece engaging member with a workpiece to actuate the actuating member; and means responsive to the actuation of the actuating member to operate the control mechanism.
 3. A control system according to claim 1 further comprising: means mounting the first work-engaging member for movement from a starting location toward the workpiece and means effective during a machine cycle to yieldably move the first workpiece-engaging member from the starting location towards a workpiece to thereby enable the first workpiece engaging member to move an amount that is dependent on the size of the workpiece; and wherein the control mechanism comprises: a setting member; means mounting the setting member for movement from an initial position; means so connecting the first workpiece-engaging member and the setting member as to move the setting member from its initial position to a setting position by an amount that is proportional to the distance between the starting location and the location of engagement with a workpiece of the first-workpiece engaging member; and a shifting mechanism for causing the second workpiece engaging member to move by an amount that is proportional to the distance between the setting position during said particular machine cycle and the setting position during said preceding machine cycle and in a direction that corresponds to the direction extending from the setting position in said particular machine cycle and the setting position in said preceding machine cycle.
 4. A control system according to claim 3 wherein the control mechanism further comprises: an actuating member mounted to the first workpiece engaging member; means responsive to the engagement of the first workpiece-engaging member with a workpiece to actuate the actuating member; and means responsive to the actuation of the actuating member to operate the shifting mechanism.
 5. A control system for interrelating the operation of a toe-lasting machine and a heel-lasting machine; wherein the toe lasting machine comprises: means for supporting a shoe assembly that includes a last having an insole on its bottom and an upper draped thereon with the toe end of the shoe assembly facing rearwardly; toe wiping means movable in a toe wiping stroke to wipe the toe portion of the margin of the upper against the insole; a heel clamp located forwardly of the shoe assembly; and means mounting the heel clamp for rearward movement as to enable it to engage a shoe assembly during a machine cycle in a location that is dependent on the length of the shoe assembly to hold the shoe assembly in position during a toe wiping stroke; wherein the heel-lasting machine comprises: a support for supporting a shoe assembly with the heel of the shoe assembly facing rearwardly; heel wiping means movable in a heel-wiping stroke to wipe the heel portion of the margin of the upper against the insole; and a toe rest, located forwardly of the support and mounted for forward-rearward movement, adapted to support the vamp of a shoe assembly during a heel wiping stroke; and further comprising: a control mechanism interconnecting the machines operable to cause the toe rest to move an amount that is proportional to the distance between the location of engagement of the heel clamp with a particular show assembly during a particular machine cycle and the location of engagement of the heel clamp with a different show assembly during the machine cycle that precedes said particular machine cycle and in a direction that corresponds to the direction extending from the location of engagement of the heel clamp with said different shoe assembly towards the location of engagement of the heel clamp with said particular shoe assembly.
 6. A control system according to claim 5 wherein the control mechanism comprises: an actuating member mounted to the heel clamp; means responsive to the engagement of the heel clamp with a shoe assembly to actuate the actuating member; and means responsive to the actuation of the actuating member to operate the control mechanism.
 7. A control system according to claim 5 wherein the toe-lasting machine further comprises: means mounting the heel clamp for movement from a starting location toward the shoe assembly; and means effective during a machine cycle to yieldably move the heel clamp from the starting location towards a shoe assembly to thereby enable the heel clamp to move an amount that is dependent on the length of the shoe assembly; and wherein the control mechanisms comprises: a setting member; means mounting the setting member for movement from an initial position; means so connecting the heel clamp and the setting member as to move the setting member from its initial position to a setting position by an amount that is proportional to the distance between the starting location and the location of engagement with a shoe assembly of the heel clamp; and a shifting mechanism for causing the toe rest to move an amount that is proportional to the distance between the setting position during said particular machine cycle and the setting position during said preceding machine cycle and the setting position during said preceding machine cycle and in a direction that corresponds tO the direction extending from the setting position in said particular machine cycle and the setting position in said preceding machine cycle.
 8. A control system according to claim 7 wherein the control mechanism further comprises: an actuating member mounted to the heel clamp means responsive to the engagement of the heel clamp with a shoe assembly to the actuating member; and means responsive to the actuation of the actuating member to operate the shifting mechanism. 